Console Messages in Flutter

Question

I am currently in the master channel in Flutter on Version 2.6.0-12.0.pre.406 and every time i run an app im getting these strange messages in the console and i just wanna know why and what they mean and if i can ignore these. This even happens when i am newly creating an app and run it without editing anything. So even when i am running the example app.

This is the output:

Launching lib\main.dart on ... in debug mode...
Running Gradle task 'assembleDebug'...                              7,0s
√  Built build\app\outputs\flutter-apk\app-debug.apk.
I/ViewRootImpl@963f43d[MainActivity](25682): [DP] cancelDraw io.flutter.embedding.android.FlutterActivityAndFragmentDelegate$2@ba09739  isViewVisible: true
I/ViewRootImpl@963f43d[MainActivity](25682): [DP] cancelDraw io.flutter.embedding.android.FlutterActivityAndFragmentDelegate$2@ba09739  isViewVisible: true
I/ViewRootImpl@963f43d[MainActivity](25682): [DP] cancelDraw io.flutter.embedding.android.FlutterActivityAndFragmentDelegate$2@ba09739  isViewVisible: true
I/ViewRootImpl@963f43d[MainActivity](25682): [DP] cancelDraw io.flutter.embedding.android.FlutterActivityAndFragmentDelegate$2@ba09739  isViewVisible: true
I/ViewRootImpl@963f43d[MainActivity](25682): [DP] cancelDraw io.flutter.embedding.android.FlutterActivityAndFragmentDelegate$2@ba09739  isViewVisible: true
I/ViewRootImpl@963f43d[MainActivity](25682): [DP] cancelDraw io.flutter.embedding.android.FlutterActivityAndFragmentDelegate$2@ba09739  isViewVisible: true
I/ViewRootImpl@963f43d[MainActivity](25682): [DP] cancelDraw io.flutter.embedding.android.FlutterActivityAndFragmentDelegate$2@ba09739  isViewVisible: true
I/ViewRootImpl@963f43d[MainActivity](25682): [DP] cancelDraw io.flutter.embedding.android.FlutterActivityAndFragmentDelegate$2@ba09739  isViewVisible: true
I/ViewRootImpl@963f43d[MainActivity](25682): [DP] cancelDraw io.flutter.embedding.android.FlutterActivityAndFragmentDelegate$2@ba09739  isViewVisible: true
I/ViewRootImpl@963f43d[MainActivity](25682): [DP] cancelDraw io.flutter.embedding.android.FlutterActivityAndFragmentDelegate$2@ba09739  isViewVisible: true
I/ViewRootImpl@963f43d[MainActivity](25682): [DP] cancelDraw io.flutter.embedding.android.FlutterActivityAndFragmentDelegate$2@ba09739  isViewVisible: true
I/ViewRootImpl@963f43d[MainActivity](25682): [DP] cancelDraw io.flutter.embedding.android.FlutterActivityAndFragmentDelegate$2@ba09739  isViewVisible: true
I/ViewRootImpl@963f43d[MainActivity](25682): [DP] cancelDraw io.flutter.embedding.android.FlutterActivityAndFragmentDelegate$2@ba09739  isViewVisible: true
Syncing files to device ...                                 98ms
I/ViewRootImpl@963f43d[MainActivity](25682): [DP] cancelDraw io.flutter.embedding.android.FlutterActivityAndFragmentDelegate$2@ba09739  isViewVisible: true

Flutter run key commands.
r Hot reload.
R Hot restart.
h List all available interactive commands.
d Detach (terminate "flutter run" but leave application running).
c Clear the screen
q Quit (terminate the application on the device).

 Running with sound null safety 

An Observatory debugger and profiler on ... is available at: http://127.0.0.1:59402/M3bn7N7nUow=/
I/ViewRootImpl@963f43d[MainActivity](25682): [DP] cancelDraw io.flutter.embedding.android.FlutterActivityAndFragmentDelegate$2@ba09739  isViewVisible: true
I/ViewRootImpl@963f43d[MainActivity](25682): [DP] cancelDraw io.flutter.embedding.android.FlutterActivityAndFragmentDelegate$2@ba09739  isViewVisible: true
I/ViewRootImpl@963f43d[MainActivity](25682): [DP] cancelDraw io.flutter.embedding.android.FlutterActivityAndFragmentDelegate$2@ba09739  isViewVisible: true
I/ViewRootImpl@963f43d[MainActivity](25682): [DP] cancelDraw io.flutter.embedding.android.FlutterActivityAndFragmentDelegate$2@ba09739  isViewVisible: true
I/ViewRootImpl@963f43d[MainActivity](25682): [DP] cancelDraw io.flutter.embedding.android.FlutterActivityAndFragmentDelegate$2@ba09739  isViewVisible: true
I/ViewRootImpl@963f43d[MainActivity](25682): [DP] cancelDraw io.flutter.embedding.android.FlutterActivityAndFragmentDelegate$2@ba09739  isViewVisible: true
I/ViewRootImpl@963f43d[MainActivity](25682): [DP] cancelDraw io.flutter.embedding.android.FlutterActivityAndFragmentDelegate$2@ba09739  isViewVisible: true
I/ViewRootImpl@963f43d[MainActivity](25682): [DP] cancelDraw io.flutter.embedding.android.FlutterActivityAndFragmentDelegate$2@ba09739  isViewVisible: true
I/ViewRootImpl@963f43d[MainActivity](25682): [DP] cancelDraw io.flutter.embedding.android.FlutterActivityAndFragmentDelegate$2@ba09739  isViewVisible: true
I/ViewRootImpl@963f43d[MainActivity](25682): [DP] cancelDraw io.flutter.embedding.android.FlutterActivityAndFragmentDelegate$2@ba09739  isViewVisible: true
I/ViewRootImpl@963f43d[MainActivity](25682): [DP] cancelDraw io.flutter.embedding.android.FlutterActivityAndFragmentDelegate$2@ba09739  isViewVisible: true
I/ViewRootImpl@963f43d[MainActivity](25682): [DP] cancelDraw io.flutter.embedding.android.FlutterActivityAndFragmentDelegate$2@ba09739  isViewVisible: true
I/ViewRootImpl@963f43d[MainActivity](25682): [DP] cancelDraw io.flutter.embedding.android.FlutterActivityAndFragmentDelegate$2@ba09739  isViewVisible: true
I/ViewRootImpl@963f43d[MainActivity](25682): [DP] cancelDraw io.flutter.embedding.android.FlutterActivityAndFragmentDelegate$2@ba09739  isViewVisible: true
I/ViewRootImpl@963f43d[MainActivity](25682): [DP] cancelDraw io.flutter.embedding.android.FlutterActivityAndFragmentDelegate$2@ba09739  isViewVisible: true
I/Gralloc4(25682): mapper 4.x is not supported
W/Gralloc3(25682): mapper 3.x is not supported
I/gralloc (25682): Arm Module v1.0
I/ViewRootImpl@963f43d[MainActivity](25682): [DP] cancelDraw io.flutter.embedding.android.FlutterActivityAndFragmentDelegate$2@ba09739  isViewVisible: true
I/ViewRootImpl@963f43d[MainActivity](25682): [DP] cancelDraw io.flutter.embedding.android.FlutterActivityAndFragmentDelegate$2@ba09739  isViewVisible: true
The Flutter DevTools debugger and profiler onv... is available at: http://127.0.0.1:9101?uri=http://127.0.0.1:59402/M3bn7N7nUow=/
I/ViewRootImpl@963f43d[MainActivity](25682): [DP] pd() Asnyc report
I/SurfaceView(25682): setParentSpaceRectangle: useBLAST = false position = Rect(0, 0 - 1440, 3020) frameNumber = 1 t = android.view.SurfaceControl$Transaction@89f17e
I/SurfaceView(25682): applySurfaceTransforms: t = android.view.SurfaceControl$Transaction@89f17e surfaceControl = Surface(name=SurfaceView - com.example.randomdice2/com.example.randomdice2.MainActivity@761f583@0)/@0x7c466df frame = 1
I/SurfaceView(25682): applySurfaceTransforms: postScaleX = 1.0 postScaleY = 1.0
I/ViewRootImpl@963f43d[MainActivity](25682): [DP] pdf(0) 1 android.view.ViewRootImpl.lambda$performDraw$1$ViewRootImpl:4668 android.view.-$$Lambda$ViewRootImpl$DJd0VUYJgsebcnSohO6h8zc_ONI.run:6 android.os.Handler.handleCallback:938
I/ViewRootImpl@963f43d[MainActivity](25682): [DP] rdf()

Answer 1

I changed classpath 'com.google.gms:google-services:4.4.0' which was was located at android\build.gradle to classpath 'com.google.gms:google-services:4.3.15' downgrading the version, and it worked.

Answer 2

I had the same error once I integrated Firebase into my flutter application. This may not be a legitimate solution to this error, but here is what I did.

1. Upgraded minSdkVersion to 24(ANDROID/APP/build.gradle)

Usually firebase required us to upgrade the SDK to 19. I changed it to a higher SDK(in this case 24) for testing purposes.

2. Clean & Build gradle

I then cleaned the our android gradle files with the following cmds;

• cd android -> if you are at the root of your flutter project
• ./gradlew clean -> To clean the gradle environment
• ./gradlew build -> To build again on a clean environment

3. Cleaned and run in the flutter environment

• cd .. -> To return to the root
• flutter clean -> Cleans the flutter workspace
• flutter pub get -> Gets back the deleted packages and dependencies
• flutter run -> Runs the application

I hope this helps out someone, as I said it is not a legitimate solution, but it is what worked for me. If this fails. Also consider checking the compatibility of the JAVA and Gradle SDK versions by;

• cd android -> Going back into android project.
• java --version -> To check for java version.
• ./gradlew --version -> to check the gradle version. Using the commands above, you may check the compatibility here